diff --git a/docs/lto-barcode/code39.js b/docs/lto-barcode/code39.js
index 5c715cd7..4dba242f 100644
--- a/docs/lto-barcode/code39.js
+++ b/docs/lto-barcode/code39.js
@@ -69,8 +69,8 @@ let colors = [
     '#705A81',
 ];
 
-let lto_label_width = 70;
-let lto_label_height = 17;
+const lto_label_width = 70;
+const lto_label_height = 16.9;
 
 function foreach_label(page_layout, callback) {
     let count = 0;
diff --git a/docs/lto-barcode/paper-size.js b/docs/lto-barcode/paper-size.js
index d2481f3c..c725636e 100644
--- a/docs/lto-barcode/paper-size.js
+++ b/docs/lto-barcode/paper-size.js
@@ -15,9 +15,9 @@ let paper_sizes = {
 	page_width: 210,
 	page_height: 297,
 	label_width: 70,
-	label_height: 17,
+	label_height: 16.9,
 	margin_left: 0,
-	margin_top: 4,
+	margin_top: 5,
 	column_spacing: 0,
 	row_spacing: 0,
     },